Open Access Original Research Article

Performance Testing and Evaluation of On-Farm Mobile Paddy Dryer

N. Sreedhar Reddy, Y. Prem Santhi, K. Ramya Sree, K. Ch. S. Sai Kiran, S. Vishnu Vardhan

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/CJAST/2018/42005

Efficient drying from any mobile paddy dryer would result in the superior quality of the product within a desirable time. Dryer was evaluated using 5332.5 kg of freshly harvested paddy at 21.01% moisture content (w.b). The air velocity at top layer was found to vary from 0.50 to 0.33 m/s at loading condition and 1.7 to 0.6 m/s at no-load condition. The moisture content, the coefficient of uniformity (Cu) and moisture ratio at bottom of the drying chamber were observed to vary from 21.03 to 13.44% (w.b), 91.47 to 98.32%, and 0.928 to 0.085 respectively during the start to the end of the drying. The temperature of the drying chamber at bottom and top layers were found to vary from 35.57 to 32.47°C and 40.63 to 32.47°C, respectively. The relative humidity values at the bottom and top layers were 95.87 to 94.27% and 72.40 to 93.43%, respectively during drying. At the end of drying after 4.5 h, the final moisture was estimated to be 15.23% (w.b). The thermal efficiency, heat utilization factor and effective heat efficiency were calculated to be about 58.5%, 0.99 and 0.89, respectively. The total power requirement was assumed to be 15 kW. The cost of drying was found to be Rs. 943 /h and Rs. 0.79 /kg of paddy.

Open Access Original Research Article

Development of Multiple Regression Model in Predicting the Dissolved Oxygen Deficit of Ntawaogba River

N. , Ugbebor John, C. Adeshina, Daniel

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/CJAST/2018/39762

This study developed a multiple regression model for predicting the dissolved oxygen deficit for Ntawaogba River in Port Harcourt, Rivers State Nigeria. The instrument used for field sampling includes 1L sample container, Garmin GPS, EXTEC water equipment/Horiba, BOD bottle, Floaters, Measuring Tape, Stop watch, Ice chest and sample log book.  Ten samples were collected along the river stretch at distance of 100 m apart. Water quality analysis on the samples showed that ammonia and total coli form counts were higher than Federal Ministry of Environment recommended limits and the dissolved oxygen value ranges from 3.65-5.6mg/l. The computed deoxygenating rate constant was 0.38 and reaeration rate constant was 0.99. The Fair ratio, “f” for the river was 2.55; the dissolved oxygen (DO) deficit at initial time was 3.85mg/l and at critical time (1.72d-1) the critical deficit was 2.48 mg/l respectively. Multiple regression model was developed for dissolved oxygen deficit of the study river using appropriate excel software; considering  BOD, temperature and river flow with constant b0b1b2b3 to be 2.690293, 0.899899, -0.16754, and 0.042823 for respective sample points down the river at any point. These results indicated that the river is polluted and the fluctuation in DO values was attributed to constant waste discharges into the river from various sources and the hydraulic condition of the river.The study recommended that waste discharge into the river should be discouraged and monitored to mitigate further degradation.

Open Access Original Research Article

Assessment of Energy Use Pattern in Different Operations from Various Sources for Cultivation of Sugarcane in the District of Narsinghpur, Madhya Pradesh, India

Avinash Kumar, Atul Kumar Shrivastav, Aaradhana Patel

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/CJAST/2018/42316

The production and productivity are directly related use in unit operation of agricultural production. The variation in yield of crop occurs in Narsinghpur District of Madhya Pradesh due to in wide variation in energy inputs, agro-climatic conditions and resources used. Keeping this in view, the present study deals with energetics of sugarcane in the district of Narsinghpur, Madhya Pradesh, for getting higher energy input. In the selected area, all the physical inputs in the form of direct and indirect sources and output in the form yield of grain and by-product are converted into common units of energy (MJ) per unit area (ha). The trend of use of direct energy (human, mechanical, electrical etc. and indirect energy seed, fertilizer, chemical etc.  was studied for performing different field operations from tillage to transport operations). The most energy consuming operation was irrigation, it consumed about 79056.13 MJ/ha and it consumed 51% of total energy. Among physical input the fertilizer contributed maximum energy and its maximum energy value was 61200 MJ/ha where as some farmers were found using less than 23485.5 MJ/ha of the total energy input.

Open Access Original Research Article

Effect of Foliar Application of B, Zn and Cu on Yield, Quality and Economics of Rainy Season Guava Cultivation

Sayan Sau, Sukamal Sarkar, Bikash Ghosh, Krishnedu Ray, Prahlad Deb, Dibakar Ghosh

Current Journal of Applied Science and Technology, Page 1-10
DOI: 10.9734/CJAST/2018/42131

Aims: The study was aimed to investigate the effects of micronutrients fertilization on the growth, yield and quality as well as economics of guava fruits (cv. Allahabad Safeda) in new alluvial zone of West Bengal, India.

Methodology: A field experiment was conducted at Horticulture Research Station, Mondouri, Bidhan Chandra Krishi Viswavidyalaya, West Bengal during rainy seasons of 2013-14 and 2014-15. The experiment was laid out in a randomized block design with seven different combinations of three micronutrients (B, Zn and Cu) and a control (without micronutrient).

Results: Experimental findings showed that combined application of Boron (B) and Zinc (Zn) recorded the highest fruits number/tree (133) and fruit yield (12.63 kg/tree) amongst different micronutrient combinations. The same treatment also significantly increased fruit physical and chemical parameters like fruit weight, fruit volume, fruit pulp thickness, total soluble solids, ascorbic acid, and sugar content. Higher uptake of plant-nutrients and increased chlorophyll content in guava leaf were also recorded from the plants with combined application B and Zn.

Conclusion: The results of this study indicate that combined foliar application of B and Zn is not only most effective for getting higher production but also for better quality fruits in alluvial Gangetic plains of West Bengal.

Open Access Original Research Article

Nutritional Evaluation of Cereal-pulse Based Extruded Snacks Supplemented with Dehydrated Herbs

Gurpreet Kaur, Neerja Singla, Baljit Singh, Mohammed Javed

Current Journal of Applied Science and Technology, Page 1-14
DOI: 10.9734/CJAST/2018/41901

Aim: To do nutritional evaluation of cereal-pulse based extruded snacks supplemented with dehydrated herbs.

Study Design: Experimental.

Place and Duration of Study: sample: department of food and nutrition and department of food science and technology, Punjab agricultural university, Ludhiana, Punjab, India, between Jan 2015 to Dec, 2017.

Methodology: In the present investigation, a combination of wheat and chickpea (80:20) was used for formulation of extruded snacks which were supplemented with varying levels of 1-5 percent dried herbs namely basil (bl), mint (ml), drumstick leaves (dl) and a mixture of all these herbs (mxl) having one percent of each herb. The acceptable extrudates were analysed for different nutritional parameters namely: Proximate, vitamins minerals, bioactive components and in vitro nutrient digestibility.

Results: Organoleptically extrudates were found to be most acceptable at three percent level of supplementation for all the herbs. Overall acceptability of various extrudates was in the order of mxl>dl>ml>bl. The moisture, ash, crude protein, fibre and fat content of supplemented extruded snacks ranged from 3.40 to 3.88, 2.32 to 2.90, 11.35 to 12.20, 3.0 to 3.36 and 1.67 to1.75 g/100 g, respectively.  Ascorbic acid and β-carotene content of supplemented extruded snacks ranged from 9.72 to 12.98 mg/100 g and 54.71-98.10 µg/100 g, respectively.  Total iron, calcium and zinc content in supplemented extruded snacks were found to increase in the range of 19-29, 38-77 and 52-63%, respectively in comparison to control. The total phenol and flavonoid content of supplemented extruded snacks varied from 153.45 to 184.76 mg GAE/100 g and 222.38 to 384.40 mg RE/100 g, respectively. The percent increase in total antioxidant capacity (tac) in supplemented snacks ranged from 97-124, 93-125, 96-154 and 25-46%, respectively by DPPH, ABTS, FRAP and RPA respectively as compared to control.

Conclusion: It can be concluded that supplementation of some of the commonly used dehydrated herbs leaves in the powder form to the cereal-pulse based extruded snacks can help to introduce a new type of value-added snacks which will not only satisfy consumers short time hunger but also provide numerous health benefits especially in terms of bioactive components.

Open Access Original Research Article

Structural Changes in Mechanised Trawl Fleet along Maharashtra Coast, India

Manoharmayum Shaya Devi, Veerendra Veer Singh, Leela Edwin, K. A. Martin Xavier, Latha Shenoy

Current Journal of Applied Science and Technology, Page 1-12
DOI: 10.9734/CJAST/2018/42281

Trawl fisheries is an important component in marine capture fisheries of the major contributing state of India like Maharashtra. In spite of the issues like overfishing, overcapacity and destruction caused, trawlers continue to contribute to major catch in India. Since the introduction of trawlers in many parts of India, there are structural changes due to technological interventions regarding design, construction and numbers of craft and gears. Of the 5613 trawlers in Maharashtra, 2849 trawlers were operated in Greater Mumbai. Considering the importance of the trawlers operated, the present study attempted to study the composition of trawlers, operational details of single-day and multi-day fishing and changing trend of trawl fisheries along Mumbai coast. The study was conducted from August 2016 to April 2018 at the major 3 landing centres of the Greater Mumbai i.e., Versova, Sassoon Dock (SSD) and New Ferry Wharf (NFW). Trawlers of length ranged between 16 to 17 m were dominant at Versova while 17-18 m were dominant at SSD and NFW. The dominant installed engine horsepower at Versova, SSD and NFW were 50 to 100, 150-200 and 100-150 respectively. The relationship between length overall (LOA) of trawlers and engine horsepower showed that the value of installed engine power was according to  LOA at Versova while this was not true in the case of SSD and NFW. Fibre material for hull construction is on the rise due to its low cost of maintenance. The study reported larger vessels with higher horsepower were involved in multi-day fishing. Multi-day vessels tend to have the fishing endurance of 2 to 23 days. Trawl fisheries of Mumbai coast have undergone major structural changes regarding catch, number of vessels and type of trawling. The study suggested the need for restriction on the installed engine horsepower, number of trawlers operated and strict implementation of mesh size regulation. The study also suggested proper regulation of the vessel registration in the case of trawlers operated at SSD to avoid misuse of the registration for purse-seining.

Open Access Original Research Article

Green Colloidal Composites from Local Agro-wastes for Inhibition of Mild Steel Corrosion in 1 M HCl

Ekemini B. Ituen, Uwemedimo E. Udo

Current Journal of Applied Science and Technology, Page 1-11
DOI: 10.9734/CJAST/2018/41824

Aims: To investigate the corrosion inhibition efficiency of green colloidal water-soluble composites formulated from Thaumatococcus daniellii extract (TDE) and local agro-wastes as alternative oilfield chemicals using mild steel in 1 M HCl.

Study Design: Corrosion was monitored by Weight Loss (WL), Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP) techniques.

Place and Duration of Study: Materials and Oilfield Chemistry (MOC) laboratory, Department of Chemistry, Faculty of Science, University of Uyo, Nigeria, between December 2017 and March 2018.

Methodology: The standard procedures for thermo-gravimetric analyses (TGA), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) were exactly followed to evaluate corrosion efficiency.

Results: Inhibition efficiency of 91.7% was obtained with TDE 30℃ but this efficiency decreased as temperature increased. Increase in TDE concentration increased charge transfer resistance and decreased double layer capacitance. Adsorption isotherms and kinetic models were also used to describe the adsorption and activation processes. The presence of TDE increases the activation energy and reduces the rate of corrosive attack of the acid on the steel specimens. The adsorption of Thaumatococcus danielliiextract (TDE) on the mild steel surface was characteristic of inhibition by physisorption. Composites from TDE were up to 99% and 85% efficient at 30°C and 80°C respectively.

Conclusion: Adsorption of TDE molecules is by spontaneous physical adsorption mechanism and is best approximated by the Langmuir adsorption isotherm. TDE formulations and composites could be exploited to produce an effective alternative eco-friendly oilfield corrosion inhibitor.